need help: cab level sensor is leaking air from fitting

[Plasa]

Hello forum.
I'm in the middle of nowhere and I have a little annoying problem. The cab level sensor behind the cab is leaking air. If I move the tube that come from the tanks it's changing, so I think it's a problem of the fitting between sensor and tube.
I already tried to cut the tube, put some teflon around the tube but nothing really helps for long. Anyone knows if this fittings (seems a push in fitting) can be replaced? and the size?
Thank you for any help!

Christian

 

[Ronmar]

If there is no hex wrench fitting then the pushlock fittings are built into the valve and not serviceable. The O-ring inside the fitting has probably failed so you could put some silicone sealant around the tube before you insert it in the fitting, then coat over it with sealant and let cure to see if that gets you going untill you replace the valve.

In a pinch, you could replace the height control valve with a low pressure regulator and apply just enough air pressure to lift the cab. The reg would makeup for air leaks/losses but would not adapt to weight changes in the cab so might take a bit of tweaking to get it right when the passengers are onboard... I guess you could put the regulator up in the cab...

 

[Plasa]

Thank you very much! I have to check it if they have a hex wrench. from outside it looks not. what a mess... in the tm seems that the tee is attached directly to the valve, but no one knows if the tm is correct
Christian

 

[Ronmar]

Supply air flows thru a push lock T fitting just before the leveling valve. That is to allow air to drain back from the bags thru a check-valve and thru that T when you turn off the cab suspension air button and vent the line... I did away with that portion and simplified my plumbing little when I built my suspension system as i was not really needing instant deflate to load on an aircraft